He currently plays for Al Ansar SC, wearing the number 14 shirt. At the international level, he represents Lebanon U20. He plays primarily as a Midfield. His current market value is estimated at 250K .

His most recent move was a Free from Al Nejmeh SC to Al Ansar SC on 2026-01-05.

Across 2 appearances in the AFC Challenge League 2024-2025, Mahdi Zein registered 1 goals and 0 assists, while completing 0 key passes out of 0 total passes with a passing accuracy of -.